Merry Britmas, y'all! It was the queen of pop's 36th birthday recently [1], so The Fitness Marshall decided to celebrate in style (and in the holiday spirit, of course) with this total Christmas throwback [2] (and, honestly, one of Britney's best songs). This is sure to get you in the spirit, feeling good, and sweating profusely.
Links:
[1] https://www.popsugar.com/celebrity/Britney-Spears-Celebrates-Her-36th-Birthday-Instagram-44322919
[2] https://www.popsugar.com/celebrity/Britney-Spears-Pictures-Over-Years-40738670
[3] https://www.popsugar.com/fitness/Fitness-Marshall-BTS-DNA-Dance-Cardio-Video-44283881